Rotary motor.



` No. 649,095. Patented My 8, |900. J. B. ZURA.

ROTARY MOTOR.

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No. 649,095. Patented May 8, 1900.

J. B. ZURA. f

ROTARY MOTOR.

(Application Bled June-30, .1898.)

3 Sheets-Sheet 2` (No Model.)

Patented May 8, |900.

J. B. ZURA.

RUTABY MOTOR.

(Application led June 80, 1896.) v

3 Sheets-Sheat 3.

(No Model.)

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UNITED vSTAI-Es Paarnrrr OFFICE.

JOsEE BRUNO ZURA, OE BERLIN, GERMANY.

ROTARY Moron.

SPECIFICATION arming part or Letters raient No. 649,695, dated May s,1900.

Application iiletl J une 30, 1898.

To all whom t mag/:concern: Be it known that I, J OsEE BRUNO ZURA, asubject of the King of Prussia, German Emperor, residing at the city ofBerlin, Germany, have invented a new and useful Mechanism for QuicklyActuating the Obturator of Rotary Motors, (for which I have obtained apatent in France, No. 277,177, filed April 20, 1898; in Belgium, No.135,202, filed April 20, 1898; in Great Britain, No. 8,004, filed April14, 1898; in Luxemburg, No. 3,149,1led March 8, 1898; in Switzerland,No. 16,703, filed March 28, 1898, and in Hungary, I\Io.14',819,l filedApril 3, 1898,) of which the following is a specification. l

My invention relates, first, to mechanism for quickly actuating theobturator or slide-valve of rotary motors, thereby reducing the loss ofsteam to a minimum, the obturator not being moved during the usefuloperation of the steam, but allowing the wing-piston to perform nearlyits full working revolution and pass by the same, whereupon theobturator is quickly closed steam-tight with a noiseless movement.

The invention relates, secondly, to means for insuring the steam-tightOperation of the obturator and of the wing-piston.

In the accompanying drawings, Figure lis a vertical section of a rotarymotor with the invention applied thereto; Fig. 2, a section on line fr*ai* of Fig. 1 with parts similar to those shown on the left-hand 'sideomitted on the right-hand side; Fig. 3, a detail side view, on anenlarged scale, of the cam mechanism by which the obturator is actuated;and Fig. 4, a modification of the same. Figs. 5 and 6 are respectivelyan elevation and a plan of a modied construction of the mechanism foractuating the obturator; Fig. 7, modified means for connecting theobturator with the rod through which it is actuated; Fig. 8, a

section of the steam-cyli nder of the motor with" the obturator in edgeview; Fig. 9, a section on line y* y* of Fig. 8. Figs. 10 and 11 referto details of construction of the wing-piston.

The wing-piston u is constructed to take up wear. It comprises a platem, keyed or wedged onto the nave b and .provided in the middle of itsedges with grooves for the reception of movable frame parts y y' y2,furnished with oblique slots o, in which engage studs z, fixed stanNin/684.900. (No man.)

side edges and guidance of the obturator or slide f.

g, Fig. 2, isa vcross-bar guided in its up? ward-and-downward movementby the bolts h and having attached to it the obturator slide-rod i. Thecross-bar is jointed at each end to one end of a connecting-rod 7c, thekother end of which connects with a lever Z, carried by an eye m of astandard fri. The

lever l is provided with an enlargement 0, v

having a curved surface, against Whichthe curved surface p of the cam qmoves. This cam is fixed on'the main shaft a. To the lever Z is attacheda downwardly-projecting arm r, carrying at its bottom end a lever r',one end of which is connected with the leverlby a spring and the otherend carries a roller which runs in an inner curve of the cam q. Theroller r2 follows the inner curve (shown in Fig. 3 in dotted line) ofthe cam q, thereby holding in the downward travel the leverl against theouter curve of said cam, by which means Athe obturator is also held toits seat. In order to prevent shocks, the lever r' is connected with thelever Z by a spring. Upon the rotation of the shaft a the cam q carriedaround with it, bears by its surface p, when this has arrived withinreach of the enlargement o of the lever l, against this enlargement, soas to move this lever without noise or shock and the connecting-rods lc,and with these the obturator f, up and down; and also so as to hold thelatter in its proper position, the circular portion of the cam q keepingthe obturator closed so long as the steam is operating and the curvedportion p quickly lifting it to permit the passage past the same of thewing-piston and then closing it again by reason of the rapid fall of thelever Z after the highest point of the curved surface p has passed it.

By means of the double set of working parts, one at each end of thecross-bar g, a regular and eXact motion of the obturator is obtained andthe proper operation of the lever l is secured by the lever r and rollerr2.

The modied construction shown in Fig. 4 is particularly adapted for high-speed motors. The connecting-rod 7c carries at its lower end a sleeveZ', adjustable by means of a spring or screw. The sleeve Z is providedwith one or two rollers Z2, against which the cam q moves, and thus acontrolled movement of the obturator is obtained. In the constructionshown in Figs. 5 and 6 the obturator is operated from one side only ofthe motor. Here 'w is an eye-bracket fixed to the cylinder-cover andcarrying an oscillating double lever w, forked at one end, where itconnects through links and a cross-bar with the obturator-rod, and atthe other end is ball-join ted to the connectingrod 7c3, which is movedfrom a camgroove l2 of the cam q through lever Z.

In Fig. 7 the connection between the driving-cam and the obturator-rodz" is established by means of a frame 7a4.

Having now particularly described and ascertain ed the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is l. In rotary engines, a mechanism for quickly raisingand lowering the obturator or cut-olf slide direct, previous to andafter the passage past the same of the wing-piston, and for holding thesame to its seat during the operation of the steam, consisting in thecombination of cams q fixed on the motor-shaft, said cams having araised outer curved surface and an inner curved surface; of rods k whichare connected with the obturator and jointed to levers Z; and of leversr' connected with the levers l by springs, said levers 1" beingfurnished with rollers fr2 by which they bear against the inner curvesof the cams q, substantially as described and shown.

2. In rotary engines, a mechanism for quickly raising and lowering theobturator or cut-o slide direct, previous to and after the passage pastthe same of the wing-piston, and for holding the same to its seat duringthe operation of the steam, consisting in the combination of cams qfixed on the motor-shaft, said cams having a raised outer curved surfaceand an inner curved surface; of rods 7c which are connected with theobturator and jointed to levers l; and of levers r connected with thelevers Z by springs, said levers r' being furnished with rollers r2 bywhich they bear against the inner. curves and with enlargements o on thelevers Z for rolling on the curves p of the cams q, substantially asdescribed and shown.

In testimony thatI claim the foregoing as my invention I have signed mynaine in presence of two subscribing witnesses.

JOSEF BRUNO ZURA.

Witnesses:

C. H. DAY, HENRY HnsrER.

